Home / 20,830.72-28,746.28-11,270.59

Finding the Fourth Proportional to 20,830.72, 28,746.28 and 11,270.59

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Solution

The fourth proportional to 20,830.72, 28,746.28 and 11,270.59 is: 15,553.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.72 : 28,746.28 = 11,270.59 : x
  2. Step 2: Convert to fraction form
    20,830.72/28,746.28 = 11,270.59/x
  3. Step 3: Cross multiply
    20,830.72x = 28,746.28 × 11,270.59
  4. Step 4: Simplify right side
    20,830.72x = 323,987,435.86
  5. Step 5: Solve for x
    x = 323,987,435.86/20,830.72
  6. Step 6: Final answer
    x = 15,553.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.